Control Panels for X75 Systems Installation and Operation Manual 45
Chapter 2: Operation via Front Panel Controls
NR (Noise Reduction)
When the X75HD/SD unit is equipped with the X75OPT-NR option, it
provides superior noise handling and image enhancement features on
SDTV video processing paths. Press the NR button for quick access to
the noise reduction menu.
The SDNR Insert parameter under the Video Setup > Processing > SD
NR/Enhancement menu selects a video input source to be processed
by this block. All video output groups using the video input source
selected by the SDNR Insert parameter will automatically have the SD
noise reducer inserted into their video processing paths.
If you are working in either the SD-SDI or HD-SDI noise reducer
menu, the NR button will light up. If either of the noise reducers is
enabled, the NR button will stay lit even if you exit the menu. In
SD-SDI, the enabling parameter is Noise Reduction; in HD-SDI the
enabling parameter is HD NR Enable.
SD NR/Enhancement
The optional video noise and artifact reducer is based on AVARI
(Advanced Video Artifact Reducer I) technology. This feature is
capable of impulse noise reduction, Gaussian random noise reduction,
compression “blockiness” and mosquito artifact reduction and the
sharpening and softening of images.
The impulse noise reducer is particularly effective in reducing satellite
noise. It automatically detects impulse noise and applies a median filter
when necessary. To achieve the ideal setting, adjust the Impulse Noise
Level control to reduce more impulse noise, but not to the extent that
excessive motion artifacts are generated.
AVARI technology uses a recursive 3D directional filter that reduces
Gaussian noise and compression artifacts, which includes the ability to
block artifacts and mosquito noise. For ideal effectiveness, adjust the
Noise/Artifact Level control up to see more effect on filtering, but not
to a level where excessive blurring is visible.
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